dossiers: make build_default_individual explicit

It avoid the use of callbacks, and may avoid situations where an empty
individual is implicitely created.

app/controllers/users/dossiers_controller.rb

@@ -231,11 +231,13 @@ module Users
         return redirect_to url_for dossiers_path
       end
 
-      dossier = Dossier.create!(
+      dossier = Dossier.new(
         groupe_instructeur: procedure.defaut_groupe_instructeur,
         user: current_user,
         state: Dossier.states.fetch(:brouillon)
       )
+      dossier.build_default_individual
+      dossier.save!
 
       if dossier.procedure.for_individual
         redirect_to identite_dossier_path(dossier)

app/models/dossier.rb

@@ -207,9 +207,6 @@ class Dossier < ApplicationRecord
   delegate :france_connect_information, to: :user
 
   before_validation :update_state_dates, if: -> { state_changed? }
-  before_validation :build_default_individual,
-    if: -> { new_record? && procedure.for_individual? && individual.blank? }
-
   before_save :build_default_champs, if: Proc.new { groupe_instructeur_id_was.nil? }
   before_save :update_search_terms
 
@@ -241,10 +238,12 @@ class Dossier < ApplicationRecord
   end
 
   def build_default_individual
-    self.individual = if france_connect_information.present?
-      Individual.from_france_connect(france_connect_information)
-    else
-      Individual.new
+    if procedure.for_individual? && individual.blank?
+      self.individual = if france_connect_information.present?
+        Individual.from_france_connect(france_connect_information)
+      else
+        Individual.new
+      end
     end
   end
 

spec/factories/dossier.rb

@@ -15,9 +15,12 @@ FactoryBot.define do
         procedure = create(:procedure, :published, :with_type_de_champ, :with_type_de_champ_private)
       end
 
+      # Assign the procedure to the dossier through the groupe_instructeur
       if dossier.groupe_instructeur.nil?
         dossier.groupe_instructeur = procedure.defaut_groupe_instructeur
       end
+
+      dossier.build_default_individual
     end
 
     trait :with_entreprise do